The ember war

In the near future, an alien probe arrives on Earth with a pivotal mission - determine if humanity has what it takes to survive the impending invasion by a merciless armada. The probe discovers Marc Ibarra, a young inventor, who holds the key to a daring gambit that could save a fraction of Earth's population. Humanity's only chance lies with Ibarra's ability to keep a terrible secret and engineer the planet down the narrow path to survival. Earth will need a fleet. One with a hidden purpose. One strong enough to fight a battle against annihilation.